Lifer

You left out the most important detail: HOW MANY DIMM SLOTS are on each mobo? That will tell us if you have to discard or can re-use existing RAM between systems.

Also, brand-name OEM systems that came with 2133 RAM, are unlikely to let you use faster speeds. You can probably use faster RAM, but it wont run at XMP settings. (Unless your pre-builts are "Gaming PCs".)

Lifer

Oh, in that case, it's fairly easy and straightforward to go to 16GB in each box. Either buy 2x8GB sticks of 2133, and put one in each box, or take the stick out of one, and put it into the other, and add a 2x8GB kit of whatever speed into the other box.

Senior member

Try run 7 days at low texture detail to confirm it is a low memory issue and you wont be disappointed that things don't improve

Running two sticks will bring a nice boost to CPU performance from dual channel up to ~20% in games but RAM speed does nothing for video rendering.

Your stick should work together in her system but there is a chance it wont.

Your MB probably wont allow running a 3200 RAM kit over 2133MHz unless it has a Z series chipset

Have you looked at VGPU usage? I think you will find that if your running out of memory it will be on the GPU first which then overflows into RAM and this is a serious slow down.

At 1920x1080 max detail The game is using 4500MB VRAM and 4GB RAM so 8GB RAM should be enough for the game and you need a new GPU.
At low texture detail (8th) the game uses 2500MB VRAM, Also setting UMA texture quality to lowest drops that to 1733MB. But strangly enough RAM usage doesn't change.

Lifer

Oh, in that case, it's fairly easy and straightforward to go to 16GB in each box. Either buy 2x8GB sticks of 2133, and put one in each box, or take the stick out of one, and put it into the other, and add a 2x8GB kit of whatever speed into the other box.

Lifer

True, although, if he's going to upgrade his GPU primarily for more VRAM, why not go for the 8GB model? It's like $20-30 more, if that. Given current pricing, it seems like a worth-while investment, if it will squeeze out an extra year or two of usability on the tail end of its life.

Senior member

True, although, if he's going to upgrade his GPU primarily for more VRAM, why not go for the 8GB model? It's like $20-30 more, if that. Given current pricing, it seems like a worth-while investment, if it will squeeze out an extra year or two of usability on the tail end of its life.

Fair enough I just hadnt considered it as I'm in AU where there isn't really any 8GB 570.
570 start at $199 which is similar to the price of the 16GB RAM he was looking at and from there we have RX580 8GB at $329 which is ~10-15% faster + the ability to run max texture detail thanks to the extra memory.